conch

Short definition from Wiktionary

Noun

1. 1
   A marine gastropod of the family Strombidae which lives in its own spiral shell.
2. 2
   The shell of this sea animal.
3. 3
   A musical instrument made from a large spiral seashell, somewhat like a trumpet.
4. 4
   The semidome of an apse, or the apse itself.
5. 5
   Synonym of concher (“machine used to refine the flavour and texture of chocolate”).
6. 6
   A British Bahamian.
7. 7
   A British Bahamian: A European caucasian Bahamian
8. 8
   A denizen of the Florida Keys

Verb

1. 1
   To refine the flavour and texture of chocolate by warming and grinding, either in a traditional concher, or between rollers.
2. 2
   To play a conch seashell as a musical instrument, by blowing through a hole made close to the origin of the spiral.